:root {
  --bg: #f4f1ea;
  --fg: #1a1a1a;
  --muted: #5c5c5c;
  --border: #3a3a3a;
  --accent: #2b2b2b;
  --accent-fg: #f4f1ea;
  --success-bg: #e8f5e9;
  --success-fg: #1b5e20;
  --error-bg: #ffebee;
  --error-fg: #b71c1c;
  --warning-bg: #fff8e1;
  --warning-fg: #7c4a00;
  --card-bg: #faf8f3;
  --hover: #ebe7de;
  --active: #d4edda;
  --reserved: #fff3cd;
  --released: #e2e3e5;
  --link: #0044cc;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  padding: 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  min-height: 100vh;
}

a {
  color: var(--link);
  text-decoration: underline;
}

a:hover {
  background: var(--hover);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

header {
  text-align: center;
  margin-bottom: 1.5rem;
  border: 2px solid var(--border);
  padding: 1rem;
  background: var(--card-bg);
}

header h1 {
  margin: 0;
  font-size: 1.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

header p {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.box {
  border: 2px solid var(--border);
  background: var(--card-bg);
  padding: 1rem;
  margin-bottom: 1rem;
}

.box-title {
  margin: -1rem -1rem 1rem;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: bold;
  border-bottom: 2px solid var(--border);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
}

label {
  display: block;
  margin-bottom: 0.25rem;
  font-weight: bold;
}

select,
input[type="text"],
input[type="number"],
textarea {
  width: 100%;
  padding: 0.5rem;
  border: 2px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  font-family: inherit;
  font-size: 1rem;
}

select:focus,
input:focus,
textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 2px solid var(--border);
  background: var(--accent);
  color: var(--accent-fg);
  font-family: inherit;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  background: var(--fg);
}

.btn-secondary {
  background: var(--bg);
  color: var(--fg);
}

.btn-secondary:hover {
  background: var(--hover);
}

.btn-danger {
  background: var(--error-bg);
  color: var(--error-fg);
}

.btn-danger:hover {
  background: var(--error-fg);
  color: var(--error-bg);
}

.preview-box {
  border: 2px solid var(--border);
  padding: 0.75rem;
  background: var(--bg);
  margin-top: 1rem;
}

.preview-box .label {
  color: var(--muted);
}

.preview-box .value {
  font-weight: bold;
}

.message {
  border: 2px solid var(--border);
  padding: 1rem;
  margin-bottom: 1rem;
}

.message.success {
  background: var(--success-bg);
  color: var(--success-fg);
}

.message.error {
  background: var(--error-bg);
  color: var(--error-fg);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: end;
  margin-bottom: 1rem;
}

.filters > div {
  flex: 1 1 180px;
}

table {
  width: 100%;
  border-collapse: collapse;
  border: 2px solid var(--border);
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.5rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--accent);
  color: var(--accent-fg);
}

tr:nth-child(even) {
  background: var(--bg);
}

tr:hover {
  background: var(--hover);
}

.status {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border: 1px solid var(--border);
  font-weight: bold;
  text-transform: uppercase;
  font-size: 0.875rem;
}

.status.active {
  background: var(--active);
  color: #155724;
}

.status.reserved {
  background: var(--reserved);
  color: #856404;
}

.status.released {
  background: var(--released);
  color: #383d41;
}

.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 1000;
}

.modal {
  background: var(--bg);
  border: 2px solid var(--border);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal .modal-title {
  background: var(--accent);
  color: var(--accent-fg);
  padding: 0.75rem 1rem;
  margin: 0;
  border-bottom: 2px solid var(--border);
}

.modal .modal-body {
  padding: 1rem;
}

.modal .modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0 1rem 1rem;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.detail-item {
  border: 1px solid var(--border);
  padding: 0.5rem;
  background: var(--bg);
}

.detail-item .label {
  color: var(--muted);
  font-size: 0.875rem;
}

.detail-item .value {
  font-weight: bold;
  word-break: break-all;
}

.small {
  font-size: 0.875rem;
  color: var(--muted);
}

@media (max-width: 640px) {
  body {
    padding: 0.5rem;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  table,
  thead,
  tbody,
  th,
  td,
  tr {
    display: block;
  }

  thead {
    display: none;
  }

  tr {
    margin-bottom: 1rem;
    border: 2px solid var(--border);
  }

  td {
    border: none;
    border-bottom: 1px solid var(--border);
    position: relative;
    padding-left: 45%;
  }

  td::before {
    content: attr(data-label);
    position: absolute;
    left: 0.5rem;
    top: 0.5rem;
    width: 40%;
    font-weight: bold;
    color: var(--muted);
  }
}